20mm Focal Focus Lens by American Photonics for Up To 200W Laser Engraver CutterAdvanced Specifications: Anti reflective coated lens for <200W. Type: Meniscus Laser Focal Lens Material: Znse Laser Grade(made in the USA) Coating: 10. 6um (AR Both Side) 20mm Diameter 2mm Edge Thickness Diameter Tolerance: +0 0. 13mm Center Thickness Tolerance: 0. 1mm Focal Length Tolerance: < 1% Clear Aperture: >= 90% Diameter Scratch Dig: 40 20 Cutting Edge Features: OMTECH TESTED: Each American Photonics focal lens is tested on OMTech machines
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20mm Focal Focus Lens by American Photonics for Up To 200W Laser Engraver Cutter